/*
 * Copyright 2000-2016 JetBrains s.r.o.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.intellij.lang.ant.segments;

import com.intellij.openapi.diagnostic.Logger;

import java.awt.*;

public class DeferredActionsQueueImpl implements DeferredActionsQueue {
  private static final Logger LOG = Logger.getInstance(DeferredActionsQueueImpl.class);
  private DispatchListener myListener = DispatchListener.DEAF;
  private int myCounter = 0;

  @Override
  public void addLast(final Runnable runnable) {
    checkIsDispatchThread();
    myListener.onStarted();
    try {
      runnable.run();
    } finally{
      myListener.onFinished();
    }
  }

  private void checkIsDispatchThread() {
    myCounter++;
    if (myCounter > 127) {
      myCounter = 0;
      LOG.assertTrue(EventQueue.isDispatchThread());
    }
  }

  @Override
  public void setDispactchListener(final DispatchListener listener) {
    myListener = listener;
  }
}
